Which of the following diseases is not an autoimmune disease?
a. rheumatoid arthritis
b. Graves' disease
c. AIDS
d. multiple sclerosis
c
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Studies of glucose transport in liposomes have revealed that:a
glucose is transported against a concentration gradient. b. the binding of glucose triggers a conformational change in the carrier protein. c. the transport of solutes via carrier proteins is faster than via channel proteins. d. glucose phosphates move readily across the membrane by simple diffusion. e. glucose moves readily across the membrane by simple diffusion
Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of natural selection?
1. well-adapted individuals leave more offspring than do poorly adapted individuals 2. a change occurs in the environment 3. genetic frequencies within the population change 4. poorly adapted individuals have decreased survivorship a. 2, 4, 1, 3 b. 4, 2, 1, 3 c. 4, 1, 2, 3 d. 4, 2, 3, 1 e. 2, 4, 3, 1
How would you expect the root system of a plant grown by hydroponics to compare to the root system of a plant grown in soil?
A) absent B) less developed C) more developed D) the same
Regarding Pasteur's experiments with the S-neck flask, which of the following statements is true?
a. There was air involved. b. There was a food source involved. c. Any possibility of contamination was removed. d. All microorganisms were killed before beginning. e. All of these.